Michelson DR over San Joaquin Channel
GoodOrange County, California · 50 E Harvard Ave · Structure no. 55C0204
- Built
- 1950
- 75 years old, rebuilt 1981
- Condition
- Good
- inspected February 2024
- Type
- Slab
- Concrete Continuous
- Length
- 76 ft
- 2 main spans
- Daily traffic
- 15,500
- 2018 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Michelson DR over San Joaquin Channel is a concrete continuous slab carrying Michelson DR over San Joaquin Channel in Orange County, California. It was built in 1950 and reconstructed in 1981, so it is 75 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 15,500 vehicles a day, roughly 7% of them trucks, projected to reach 25,810 by 2046. The structure is 76 ft (23.2 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Michelson DR over San Joaquin Channel built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1981.
What condition is Michelson DR over San Joaquin Channel in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.
How much traffic does Michelson DR over San Joaquin Channel carry?
About 15,500 vehicles per day (2018 count), of which roughly 7% are trucks.
How long is Michelson DR over San Joaquin Channel?
The structure is 76 ft (23.2 m) long with a longest span of 38 ft (11.6 m) and a deck 78 ft wide.
Who owns Michelson DR over San Joaquin Channel?
It is owned by the City or Municipal Highway Agency.